本文在Read早期提出的螺位错之间交割模型的基础上,综合描述了各种符号的螺位错艾割以后割阶的形成特征和运动特点;分析了位错交割以后所产生的点缺陷的性质,以及讨论了位错交割前后其移动方向与所产生的点缺陷性质是否有关等概念,从而比较完整地阐述了螺位错的交割机制。 On the basis of the delivery model put forward by Read in the early stage, this paper describes the formation and movement features of the cut steps after screw cutting with various symbols, and analyzes the point defects after the dislocation delivery The dissertation also discusses the conception of whether the moving direction of dislocation before and after the dislocation is related to the nature of the point defect generated, and then expounds the delivery mechanism of screw dislocation more completely.